Stoker



J. MORRIS sept. 9, 1930.

STOKER Filed July l1, 1928 Patented Sept. 9, 1.930

O'*' Q-,UN,ITE5D STATES lPartnr oFFlcE JOHN MORRIS, 0F BAYONNE, New

I nv.-

lie

.the Coxe type.

JERSEY, ASSIGNOR TO INTERNATIONAL OOMBUS- TION ENGINEERING CORPORATION,OF NEXV YORK, N. Y., .A CORPORATION OF DELA- WARE,

Application filed July 11,

My invention relates to stokers, -and has special reference to travelinggrate stokers of Y'An object of the invention is to provide novel andyimproved fuel supporting vmemb'ersffor a stoker of this type.

i `Another object of the invention is to provide' means of simpleand'strong construction for Vsecuring the fuel supporting keys ot a'traveling grate stoker in place, whereby they 'may be Veasily attachedand detached and Whenjattached are securely held. x '"k'stillfurtherobject `of my invention isv to provide' an end locking key for acarrier bar of a .travelinggrate stoker of the character indicated, onwhich the same combustionv ei"- iciency may lbe maintained as von theother keys. i

severalgfeatures of the invention,

`whereby these and other objects mayv be attained, Will be'clearlyunderstood from thefollovving description and accompanying drawings, inwhich: p

Figure 1 is aplan rvie'vv of ay portion of the traveling grate of a Coxestoker embodying t'hefeatures of my invention in their preferred form; IY

"FigV 2 is a detail view inrperspective of one of the fuel supportingkeys shown in Fis-1;. A VFig. 3 is'a side View of another one of thekeys shown in F ig. 1, a section of the usual carrier bar fior the keysbeing shown; and

Fig. 4 isa sectional vievv on a reduced scale takenon the line v4`4 ofFig. 1. My invention is at present embodied inr a traveling gratestokerof the Coxe type. In this type ofstoker, he traveling grate is made 'upof a plurality o1c banks of fuel supporting keys`2 arranged one behindthe other, With the keys in each bank arranged side by side. Each banketkeys is supported on a carrier bar extending transversely of `theStoker, one of ,Which being indicatedat- 4, EachV of these carrierb'a'rs is provided with a STOKER 1928. Serial No. 291,756.

sunken Web portion 6 having fuel support ing portions formed on itsends, one of which is indicated at 8, the ends of the bar being securedonvsprocket chains (not shown) which are mounted on sprocket Wheels. 0nthe web portion Go;F each carrier bar there is secured a dove-tail orundercut rib 1() having ene end thereof spaced from the associated. fuelsupporting portion 8. The fuel supportingv keys 2 are provided with adove-tail recess 1l to permit the keys to be passed suC- cessively overthe spaced end of the dove-tail rib 10 sov as to position them on theweb in side 'by side relation, the gap provided at said end of the webpermitting the keys to be thus applied.

In accordance with my invention, the outermost one of the keys 2 on thedove-tail rib 10 has its outer side Hush with the end of the rib, and anadditional key 12 is provided for closing the space between the end otsaid outermost key and the fuel supporting portion 8 and for holding theseveral keys in proper position on said rib.

The rear portion of the outermost key on the rib 10 is provided with alaterally projecting lug 14 having` its underside semicylindrical, andhaving a vertically extending slot 1G on its forward side spaced fromits outer end.

The key 12 is of substantially the same shape and size as the other keysexcept that, in place o a dove-tail recess in its under side, it isprovided With legs 1S that rest upon the web 6. The rear portion ot' thekey 12 is provided With a semi-cylindrical recess 2O extendingtransversely thereoi and opening upwardly for receiving the lug 14, 'theforward portion ot the Wall of the recess having a rearward projection22 which is received in the slot 16 in the lug 14.

The forward ends of the key 12 and the outermost key on the rib 10. aredetachably means of al Cotter' pin 24 ends of the keys, the outer endsof said apertures being countersunk and the countersunk portions openingforwardly and upwardly as shown.

When the key 12is in position,'its rear portion is securely held inplace by the-lug 14 which interlocks with the wall of the recess` 20,and Vits forward end is held by the cotter pin 24.` T he projection 22in the slot 16 locks the two keys so that they are continuously in closecontact at their rear ends which prevents the rear end of the outermostkey on the dove-tail rib from sliding ina horizontal direction alongthe'rib, thereby preventing'a fuel leakage and maintaining the properair space between the two keys for therproper combustion of the fuelVbed. The legs 18 of the key 12 are so designed and located that they actas a lock against the end of the dovetail rib, keeping the key 12 atyalltimes in a position adjacentpto` the fuel supporting' member 8, whileproviding amplev air space for the ignited vfuel over the key anddischarging the siftings when the face of the carrie-r bar reaches avertical position. It will be apparent that the key 12 is so constructedthat the same' combustion efficiency may be maintained thereon as on theother lkeys'on the Carrier bar. Thepkey 12 may be'easily removed topermit removal of the other keys in the bank when the bank reaches aposition part Way around the forward drum of the traveling grate, theends of the banks being then separated from the adjacent banks. Toremove the key,12,`the cotterpin24 `is rst removed, theends-V ofthe pinbeing easily accessible through the forwardly opening countersunkportions kof the apertures 26. The forward end of said key is then swungupwardly until the rear edge of the wall of the recessV 2()passes'beneath the lug 14, wherec upon the key 12 may be lifted from`the grate.

To apply the key 1Q, its rear'end is passed beneath the lug 14 so astocause the recess 2O to receive the lug, and then the Cotter pin isinserted and its end spread to hold the forward vends of the-two keystogether.

Such. removal and replacement of theckeys may be, accomplished Vwhilethe stoker is in operation, which, of course, is a feature of greatpractical importance as it overcomes thenecessity of more or lesskfrequent shut' downs.

It will be apparent in accordance with my invention, that a simple,strong and convvenientmeans is .provided for securing the end key of abank of keys in place; and, also, that as the'en d key is secured to theadjacent key in the bank, it may be of the same Width andy have the samearea of'fuel supporting surface as the other keys,

As will be evident to those skilled in the art, my invention permitsvvarious'modifications without departing vfrom the spirit thereof or thescope of the appended claims."Y y

llateral movement.

2. In a traveling grate stoker, a carrier bar, fuel supporting membersmounted on the bar in side by'side relation, one of said members havinga laterally projecting lug v near one end thereof, and an adjacentmember having a recess for receiving the lug and means for detachablysecuringv the lasttwo mentioned members together near-'the end jopposite to said lug.

3. In a traveling grate stoker, a] carrier bar, fuel v supportingmembers mounted on the bar side by Sidey and extending longitudinally ofthe stoke'r, the rear portion of one of said members havingV a laterallyprojecting lug, and an adjacent `member having a substantiallysemi-cylindricalk recess .opening upwardly for receiving said lug, and

means for detachablysecuring thev forward portions ofthe last mentionedmembers together. f l c, v y

4. In a traveling grate stoker, a carrier bar, fuel support-ing membersmounted on the bar side by side and extending longitudinally of thelStoker, thev rear `portions offtWo of said members having vinterlockingportions, and means for'detachablyl securing `the Vfor,- Ward portionslof lthe last -tw'o` mentioned members together,

izo

Alook 5. In a -traveling grate stoker, a 'carrier Y Y bar, vfuelsupporting membersmounted on the bar in side by sidey relation andextending longitudinally of the stoker, the rear 'portion of one of saidmembers having a laterally projecting lug having its under surfacesubstantially semi-cylindrical, and an adjacent member havingarsubstantially cylindrical recess opening upwardly vfor yreceiving saidlug, said lug having a vertically extending slot in itsforward side, andthe wall of said recessV having a` projection extending intok said slot,and means for detachably securing tioned memberstogether. v f

6.In`a traveling grate Stoker, af carrier bar having a web and a raisedfuel supporting portion at oneend of said web,k a dovethe forwardportions of ysaid last two men- Vtail rib on said web having one endthereof spaced from saidy fuel supporting portion, fuel supporting keysmounted on `Vsaid web having dove-tail recesses in their under sides soas to permit them to be successively passed through the space at saidend oftherib and over said end so .as to be positionedcon the ribin sideby side relation, a fueIsuppOrting key positionedbetween the endmost'key y on said rib, yand saidffuel'supporting portion,V

the forward p ortion of the 1ast-mentioned key having a substantiallycylindrical recess opening upWar dly, and the next adjacent key portionsof the last tWo In gether.

In testrnon name to this s l July, 1928.

entioned keys toy whereof, I have signed vmy pacification this 9th dayof JOHN MORRIS.

